cl-satwrap -
CL-SATWRAP is a thin generic SAT solver interface to your favorite `industrial-strength' SAT solver: Whichever code wins the next SATRace competition, it is easily glued on as a new backend, no need to change your CL code

CLLIB -
CLLIB is a varied collection of Common lisp tools and routines in CLOCC

clmath -
CLMATH is a modern re-packaging of an old Common Lisp scientific library by Gerald Roylance

ulimyhmpqs -
ulimyhmpqs is an implementation of the Hypercube Multiple Polynomial Quadratic Sieve (HMPQS), an algorithm for the factorisation of large (up to about 110 digits, where the Number Field Sieve (NFS) algorithms become more efficient) integers

wu-decimal -
Wu-Decimal is a decimal number package developed by Wukix

RCL is a library for interfacing Common Lisp with the R environment using CFFI. (October 7 2007) rukubites: RCL doesn't work in SBCL, and requires some small modifications in alien-defs.lisp to accomodate CFFI API changes for defcvar.

RCLG is an unfinished R interface that works for sbcl but not clisp (as of git version October 7 2007). It seems to have a similar interface as RCL.

CommonLispStat (see also GitHub location), is a port/rewrite/re-intentioning of XLispStat to Common Lisp. The goal is to develop an "R like" set of packages which deliver additional functionality to Common Lisp for applied statistical data analysis.